function ahah(url, target) {
  if (window.XMLHttpRequest) {
    req = new XMLHttpRequest();
  } else if (window.ActiveXObject) {
    req = new ActiveXObject("Microsoft.XMLHTTP");
  }
  if (req != undefined) {
    req.onreadystatechange = function() {ahahDone(url, target);};
    req.open("GET", url, true);
    req.send("");
  }
}  

function ahahDone(url, target) {
  if (req.readyState == 4) { // only if req is "loaded"
    if (req.status == 200) { // only if "OK"
      document.getElementById(target).innerHTML = req.responseText;
	  	  
    } else {
      document.getElementById(target).innerHTML=" Error:\n"+ req.status + "\n" +req.statusText;
    }
  }
}

function load(name, div, source) {
	ahah(name,div);
	document.getElementById('button1').className='';
	document.getElementById('button2').className='';
	document.getElementById('button3').className='';
	document.getElementById('button4').className='';
	document.getElementById('button5').className='';
	document.getElementById('button6').className='';
	document.getElementById('button7').className='';
	document.getElementById('button8').className='';
	document.getElementById('button9').className='';
	document.getElementById('button10').className='';
	document.getElementById('button11').className='';
	document.getElementById('button12').className='';
	document.getElementById('button13').className='';
	
	document.getElementById(source).className='current';
	var lastItem = source;
	return false;
}